DFL Gov. Tim Walz called a special election for a vacant House seat in the Roseville area too early and must choose a later date, the state Supreme Court ruled Friday in a decision that will extend Republicans’ advantage in a power struggle with Democrats in the House by granting them another month with a one-seat majority.

The Supreme Court on Friday cancelled the special election for a metro House race later this month, finding Gov. Tim Walz set the date before state law requires.